SYSTEM AND METHOD FOR INCREASING ENGINE SOUND DURING A DOWNSHIFT

摘要

A vehicle includes an engine configured to generate power and noise. The vehicle includes a transmission configured to operate in a first gear corresponding to a first gear ratio and a second gear corresponding to a second gear ratio. The second gear ratio is less than the first gear ratio. The vehicle also includes a noise reduction device coupled to the engine and configured to operate in a first state to reduce the noise of the engine to a first volume and a second state to reduce the noise of the engine to a second volume that is greater than the first volume. The vehicle also includes an electronic control unit (ECU) coupled to the engine, the transmission and the noise reduction device and configured to control the noise reduction device to switch to the second state when the transmission shifts from the second gear to the first gear.

主权项

1. A vehicle having an engine compartment and a passenger compartment and designed to increase an engine sound during a downshift comprising:
an engine configured to generate power at a rotational speed and to generate noise as a byproduct of the power; a transmission coupled to the engine and configured to operate in a first gear corresponding to a first gear ratio and a second gear corresponding to a second gear ratio that is less than the first gear ratio such that the rotational speed of the engine increases as the transmission is shifted from the second gear to the first gear; a tube positioned in the engine compartment of the vehicle and configured to transfer the noise of the engine; a valve coupled to the tube and configured to be positioned in a first state to reduce the noise of the engine heard in the passenger compartment of the vehicle to a first volume and a second state to reduce the noise of the engine heard in the passenger compartment of the vehicle to a second volume that is greater than the first volume; and an electronic control unit (ECU) coupled to the engine, the transmission and the valve and configured to control the valve to switch from the first state to the second state when the transmission shifts from the second gear to the first gear.